JPH04110090A - Activated-sludge treating device - Google Patents
Activated-sludge treating deviceInfo
- Publication number
- JPH04110090A JPH04110090A JP2229631A JP22963190A JPH04110090A JP H04110090 A JPH04110090 A JP H04110090A JP 2229631 A JP2229631 A JP 2229631A JP 22963190 A JP22963190 A JP 22963190A JP H04110090 A JPH04110090 A JP H04110090A
- Authority
- JP
- Japan
- Prior art keywords
- water
- filtration membrane
- treated
- module
- membrane module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000007787 solid Substances 0.000 claims abstract 2
- 238000001914 filtration Methods 0.000 claims description 39
- 238000003756 stirring Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 9
- 239000010840 domestic wastewater Substances 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000013019 agitation Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、家庭排水や下水などの廃水処理に使用される
活性汚泥処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an activated sludge treatment apparatus used for treating wastewater such as domestic wastewater and sewage.
従来の技術
従来、この種の活性汚泥処理装置においては、処理槽の
内部に複数の濾過膜モジュールを所定間隔をおいて垂直
方向に配設し、この濾過膜モジュールで被処理水を固液
分離し、濾過膜モジュールを透過した透過水を処理水と
して抽出している。Conventional technology Conventionally, in this type of activated sludge treatment equipment, a plurality of filtration membrane modules are arranged vertically at predetermined intervals inside the treatment tank, and the filtration membrane modules separate solid-liquid of the water to be treated. The permeated water that has passed through the filtration membrane module is extracted as treated water.
そして、上記の活性汚泥処理装置においては濾過膜モジ
ュールの外表面にケーキ層やゲル層が付着成長するのを
防止するために、第２図に示すように、濾過膜モジュー
ル２１の下方に複数の噴気孔２２を有する散気管２３を
配設し、散気管２３から吹出す空気のエアリフト作用に
よって生じる気液二相流の上昇撹拌流で、濾過膜モジュ
ール２１の膜面を洗浄していた。In the activated sludge treatment equipment described above, in order to prevent a cake layer or gel layer from adhering and growing on the outer surface of the filtration membrane module, a plurality of layers are installed below the filtration membrane module 21, as shown in FIG. A diffuser pipe 23 having a blowhole 22 was disposed, and the membrane surface of the filtration membrane module 21 was washed with an upward stirring flow of a gas-liquid two-phase flow generated by the air lift action of the air blown out from the diffuser pipe 23.
発明が解決しようとする課題
しかし、上記した従来の構成のように、散気管２３から
吹出す空気のエアリフト作用によって生じる上昇撹拌流
で濾過膜モジュール２１の膜面洗浄を行う場合には、散
気管２３からの空気吹出量を増大することにより、濾過
膜モジュール２１の洗浄効果を高めることができるが、
次のような問題が発生する。すなわち、散気管２３から
の空気吹出量を増大すると、被処理水に対して過剰曝気
となり、特にアンモニア成分を含む被処理水においては
、そのｐＨが低くなり過ぎて活性汚泥処理に支障をきた
す問題があった。しかも、散気管２３からの吹出空気量
を増大させるためには、空気の噴出速度を速くする必要
があり、噴出速度の増加に伴って空気の拡散角度が狭め
られ、濾過膜モジュール２１の斜線部分に気液二相流が
接触されないデッドスペースが生し、この部分にケーキ
層などが付着成長して、濾過膜モジュール２１の透過流
束が低下する問題があった。さらに、エアリフトによる
洗浄は乱流効果が大きい反面、濾過膜面に不規則な振動
を与えるため、膜の接着部分の傷みがひどく膜の破損に
つながる問題があった。Problems to be Solved by the Invention However, when cleaning the membrane surface of the filtration membrane module 21 with the upward stirring flow generated by the air lift action of the air blown out from the air diffuser 23, as in the conventional configuration described above, the air diffuser By increasing the amount of air blown out from 23, the cleaning effect of the filtration membrane module 21 can be enhanced.
The following problems occur: That is, if the amount of air blown from the aeration pipe 23 is increased, the water to be treated will be aerated excessively, and the pH of the water to be treated, which especially contains ammonia components, will become too low, which will impede activated sludge treatment. was there. Moreover, in order to increase the amount of air blown from the air diffuser 23, it is necessary to increase the air jetting speed, and as the jetting speed increases, the air diffusion angle is narrowed, and the diagonally shaded portion of the filtration membrane module 21 There is a problem in that a dead space is created where the gas-liquid two-phase flow is not contacted, and a cake layer or the like adheres and grows in this part, reducing the permeation flux of the filtration membrane module 21. Furthermore, while air lift cleaning has a large turbulence effect, it also imparts irregular vibrations to the surface of the filtration membrane, which causes severe damage to the bonded portion of the membrane, leading to damage to the membrane.
本発明は上記課題を解決するもので、濾過膜モジュール
にデッドスペースを発生させることなく、膜面全体を均
一に洗浄してケーキ層などの付着成長を確実に防止する
ことができる活性汚泥処理装置を提供することを目的と
する。The present invention solves the above problems, and is an activated sludge treatment device that can uniformly clean the entire membrane surface and reliably prevent the adhesion and growth of cake layers, etc., without creating dead spaces in the filtration membrane module. The purpose is to provide
課題を解決するための手段
上記課題を解決するために本発明は、処理槽の内部に複
数の濾過膜モジュールを所定間隔をおいて垂直方向に配
設し、濾過膜モジュールで処理槽内に貯留された被処理
水を固液分離し、濾過膜モジュールを透過した透過水を
処理水として抽出する活性汚泥処理装置において、濾過
膜モジュールの下方に攪拌翼を設けた構成としたもので
ある。Means for Solving the Problems In order to solve the above problems, the present invention arranges a plurality of filtration membrane modules vertically at predetermined intervals inside a processing tank, and stores water in the processing tank using the filtration membrane modules. This activated sludge treatment apparatus separates treated water into solid-liquid and extracts permeated water that has passed through a filtration membrane module as treated water, and has a configuration in which stirring blades are provided below the filtration membrane module.
作用
上記した構成により、撹拌翼により生ぜられる撹拌流に
よって濾過膜モジュールの膜面全体が均一に確実に洗浄
される。したがって、被処理水のＢ ＯＤ ７！度に応
じて空気吹き込み管などからの空気吹出量を大小調整す
る場合にあっても、吹出空気量および噴出速度に影響さ
れることなく、濾過膜モジュールの膜面全体が均一かつ
確実に洗浄されることとなる。Effect: With the above-described configuration, the entire membrane surface of the filtration membrane module is uniformly and reliably cleaned by the stirring flow generated by the stirring blade. Therefore, the BOD of the water to be treated is 7! Even when adjusting the amount of air blown from the air blowing pipe etc. depending on the temperature, the entire membrane surface of the filtration membrane module can be cleaned uniformly and reliably without being affected by the amount of air blown and the speed of air blowing. The Rukoto.
実施例
以下本発明の一実施例を図面に基づいて説明する。第１
図〜第２図において、処理＋１１の内部には複数の濾過
ユニット２が配設されており、濾過ユニット２は、上下
部位を開放した筒状ケーシング３と、ケーシング３の内
部に等間隔をおいて垂直方向に配設された板杖をなす複
数の濾過膜モジュール４とを備えている。そして、ケー
シング３を上下に２分割した第１及び第２ケーシング３
ａ。EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In Figures 1 to 2, a plurality of filtration units 2 are arranged inside the processing + 11, and the filtration units 2 are arranged in a cylindrical casing 3 with open upper and lower parts and spaced equally spaced inside the casing 3. It is equipped with a plurality of filtration membrane modules 4 arranged vertically in the form of a board. First and second casings 3 are obtained by dividing the casing 3 into two vertically.
a.
３ｂで形成し、第１ケーシング３ａに濾過膜モジュール
４を内装するとともに、第２ケーシング３ｂの内部に小
径ケーシング３Ｃを遊嵌して設けている。さらに、各濾
過膜モジュール４の上部側を、途中に吸引ポンプ５が介
装された吸引管６に、それぞれ分岐管６ａを介して接続
している。また、処理槽１の上部側には原水を供給する
ための原水管７が開口している。3b, a filtration membrane module 4 is housed inside the first casing 3a, and a small diameter casing 3C is loosely fitted inside the second casing 3b. Furthermore, the upper side of each filtration membrane module 4 is connected to a suction pipe 6, in which a suction pump 5 is interposed, via a branch pipe 6a. Further, a raw water pipe 7 for supplying raw water is opened at the upper side of the treatment tank 1.
そして、濾過膜モジュール４の下方に位置して小径ケー
シング３ｃの内部に、駆動モータ８をもつ撹拌翼９を配
設している。また、処理槽１の上部側から下部側へと延
びる空気吹き込み管ＩＯを配管し、空気吹き込み管ｌＯ
の基端に空気吹出ブロア１１を設けている。A stirring blade 9 having a drive motor 8 is disposed below the filtration membrane module 4 and inside the small diameter casing 3c. In addition, an air blowing pipe IO extending from the upper side to the lower side of the processing tank 1 is installed, and an air blowing pipe IO is installed.
An air blower 11 is provided at the base end.
以下、上記構成における作用について説明する。Hereinafter, the effects of the above configuration will be explained.
原水管７から処理槽１に供給された家庭排水、下水など
の原水は処理槽１の内部において活性汚泥と混合された
被処理水となる。そして、被処理水は、空気吹出ブロア
ｌｌの駆動により空気吹き込み管ＩＯの先端開口から吹
き出す空気を受けて活性汚泥によって消化される。Raw water such as domestic wastewater and sewage supplied from the raw water pipe 7 to the treatment tank 1 becomes treated water mixed with activated sludge inside the treatment tank 1. The water to be treated is digested by activated sludge upon receiving air blown out from the tip opening of the air blowing pipe IO by driving the air blowing blower 11.
そして、被処理水は、吸引ポンプ５の駆動により吸引管
ｅおよび濾過膜モジュール４を通して吸引され、濾過膜
モジュール４で固液分離れて濾過膜モジュール４を透過
した透過水が処理水として抽出される。The water to be treated is sucked through the suction pipe e and the filtration membrane module 4 by driving the suction pump 5, solid-liquid separation is performed in the filtration membrane module 4, and permeated water that has passed through the filtration membrane module 4 is extracted as treated water. Ru.
そして、撹拌翼９により生ぜられる攪拌流は、各濾過膜
モジュール４の間隙を膜面に沿って上昇し、攪拌流によ
って濾過膜モジュール４の膜面全体が確実に洗浄される
。The agitation flow generated by the agitation blades 9 rises along the membrane surface through the gaps of each filtration membrane module 4, and the agitation flow reliably cleans the entire membrane surface of the filtration membrane module 4.
さらに、被処理水のＢＯＤ濃度に応じて空気吹き込み管
ｌＯからの空気吹出量を大小調整する場合にあっても、
吹出空気量および噴出速度に影響されることなく、撹拌
翼９による撹拌作用によって濾過膜モジュール４の膜面
全体が均一かつ確実に洗浄される。Furthermore, even when adjusting the amount of air blown from the air blowing pipe IO according to the BOD concentration of the water to be treated,
The entire membrane surface of the filtration membrane module 4 is uniformly and reliably cleaned by the stirring action of the stirring blades 9 without being affected by the amount of air blown and the blowing speed.
発明の効果
以上述べたように、本発明の活性汚泥処理装置によれば
、濾過膜モジュールの下方に設けた撹拌翼により生しる
攪拌流によって濾過膜モジュールの膜面を全面的に均一
に洗浄して、ケーキ層などの付着成長を確実に防止する
ことができ、被処理水のＢＯＤＩ１１度に応じた空気量
調節を行いながら、確実に濾過膜モジュールの膜面洗浄
を行うことができる。Effects of the Invention As described above, according to the activated sludge treatment apparatus of the present invention, the membrane surface of the filtration membrane module is uniformly cleaned over the entire surface by the agitation flow generated by the stirring blade provided below the filtration membrane module. As a result, adhesion and growth of cake layers and the like can be reliably prevented, and the membrane surface of the filtration membrane module can be reliably cleaned while adjusting the amount of air according to the BODI of 11 degrees of the water to be treated.
第１図は本発明の一実施例における活性汚泥処理装置の
全体断面図、第２図は従来例の活性汚泥処理装置におけ
る濾過膜モジュールの洗浄状態を示す作用図である。
１・・・処理槽、４・・・濾過膜モジュール、７・・・
撹拌翼。FIG. 1 is an overall cross-sectional view of an activated sludge treatment apparatus according to an embodiment of the present invention, and FIG. 2 is an operational view showing a cleaning state of a filtration membrane module in a conventional activated sludge treatment apparatus. 1... Processing tank, 4... Filtration membrane module, 7...
stirring blade.
Claims (1)
をおいて垂直方向に配設し、濾過膜モジュールで処理槽
内に貯留された被処理水を固液分離し、濾過膜モジュー
ルを透過した透過水を処理水として抽出する活性汚泥処
理装置において、濾過膜モジュールの下方に攪拌翼を設
けたことを特徴とする活性汚泥処理装置。1. A plurality of filtration membrane modules are arranged vertically at predetermined intervals inside the treatment tank, and the filtration membrane module separates the water to be treated stored in the treatment tank into solid and liquid, and the water permeates through the filtration membrane module. An activated sludge treatment device for extracting permeated water as treated water, characterized in that a stirring blade is provided below a filtration membrane module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2229631A JPH04110090A (en) | 1990-08-30 | 1990-08-30 | Activated-sludge treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2229631A JPH04110090A (en) | 1990-08-30 | 1990-08-30 | Activated-sludge treating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04110090A true JPH04110090A (en) | 1992-04-10 |
Family
ID=16895226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2229631A Pending JPH04110090A (en) | 1990-08-30 | 1990-08-30 | Activated-sludge treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04110090A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620605A (en) * | 1992-05-22 | 1997-04-15 | The Dow Chemical Company | Cassette membrane system and method of use for low pressure separations |
| KR100828742B1 (en) * | 2006-01-17 | 2008-05-09 | 정건용 | A Submerged Membrane Module and System Equipped With Rotating Disc Or Propeller |
| JP2010188244A (en) * | 2009-02-17 | 2010-09-02 | Act:Kk | Sewage treatment apparatus and sewage treatment method |
| JP2012176396A (en) * | 2010-11-30 | 2012-09-13 | Jfe Engineering Corp | Membrane separation activated sludge apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6437277A (en) * | 1987-08-03 | 1989-02-07 | Agency Ind Science Techn | Bioreactor |
-
1990
- 1990-08-30 JP JP2229631A patent/JPH04110090A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6437277A (en) * | 1987-08-03 | 1989-02-07 | Agency Ind Science Techn | Bioreactor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620605A (en) * | 1992-05-22 | 1997-04-15 | The Dow Chemical Company | Cassette membrane system and method of use for low pressure separations |
| KR100828742B1 (en) * | 2006-01-17 | 2008-05-09 | 정건용 | A Submerged Membrane Module and System Equipped With Rotating Disc Or Propeller |
| JP2010188244A (en) * | 2009-02-17 | 2010-09-02 | Act:Kk | Sewage treatment apparatus and sewage treatment method |
| JP2012176396A (en) * | 2010-11-30 | 2012-09-13 | Jfe Engineering Corp | Membrane separation activated sludge apparatus |
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